X-ray system



H. F. WAITE.

X-RAY SYSTEM. APPLICATION FILED JAN. 17. I920.

Patented Mar. 8, 1921.

UNITED HARRYI. WAI'IE, OF NEW YORK, N. Y.

X-RAY SYSTEM.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed January 17, 1920. Serial No. 351,988.

To all whom it may concern:

Be it known that I, HARRY F. VVAITE, a

citizen of the United States, and a resident of the city of New York,county of Queens, and State of New York, '(whose post-ofiice address is252 West 29th street, New York city,) have invented .a new and usefulImprovement in X-Ray systems' of which the following is a specification.

The object of my invention Is to provide a system of this class in whicha single step-up transformer may be used for either of two X-raygenerating tubes where it is desired to have one exposure followinganother without shifting the apparatus.

A further object is to avoid arcing and corona effects when the switchis thrown in the high tension circuit.

For a more detailed descrlption of my invention, reference is to be hadto the accompanying drawings, forming a part hereof in which- Figure 1is a sectional view of a transformer suitable for my system;

Fig. 2 is a diagrammatic view of this system.

Throughout the various views of the drawings, similar referencecharacters designate similar parts.

My improved system 1 is provided with an alternating current generator 2which is connected to the primary 3 of a transformer 4 by suitable wires5 and 6, all of which may be in the conventional'manner. The transformer4 may be of the usualform and is provided with an exterior iron case 7and has its parts immersed in oil 8 and its secondary 9 has twowindings, one of coarse wire 10 of a few turns and one of a fine wire 11of many turns, which coils are connected together and are provided withthree leads- 12, 13 and 14, the leads 12 and 14 being at the extremeends of the secondary 9, and the lead 13 being common to the coarse andfine winding, as indicated.

The cover 15 of the transformer has a central opening through whichextends a shaft 16 which, at its upper end, is provided with a handle 17and its lower end with a disk 18 which extends into the oil 8 and isimmersed therein. This cover 15, has a pin 19 which enters acorresponding slot 20 in the disk 18 and limits the throw of this diskso that it is restricted in its movement to the limits required by theswitch, aswill be explained below. The wire 12 runs to two contacts 21and 22 on top of the disk 18; the wire 13 runs to two contacts 23immediately below the contacts 21 and 22 on top of the disk 18. The wire14 runs to the contacts 24 and 25. These contacts are so spaced, one"with regard to the other, that when the apparatus is in the conditionshown in Fig. 2, the contacts 22 and 23 energize the cathode 26 of anX-ray tube 27, and heat this cathode to incandescence through suitableconductors 28 and 29 and the anode 30 of this tube is connected to thecontact 25 through a wire 31. The slot 20, pin 19 and the contacts 21and 24 are so arranged and disposed that when' the handle 17v is turnedso as to oscillate the shaft 16 to the other limit of its movement, thecontacts 21 and 23 will be connected to the hot cathode 32 of an X- raytube 33, the connection being had' through two wires 34 and 35,respectively,

and the anode '36 of this tube 33 is connected by a wire 37 to thecontact 24.

For convenience the wires 28, 29, 31, 34, 35 and 37 are provided withsuitable bindwith suitable designations so that the transformer 4 may bereadily connected to the tubes 27 and 33 in the desired manner.

From the foregoing, it is apparent that While I have shown and describedone embodiment of my invention, it is obvious that it is not restrictedthereto, but is broad enough to cover all structures that come withinthe scope of the annexed claim.

Having thus described my invention, what I claim is:

In an X-ray system,-a source of alternating current, a transformer withits primary connected to said source and a secondary,

.ing posts 38 which are preferably provided 7 two leads running fromsaid secondary,

two X-ray generating tubes with two Wires from each of the same, and oilimmersed means in the transformer for connecting the 5 two leads of thesecondary with the correspondi of the two leads of either, but not both-ray generating tubes at the same time, which means is so arranged anddisposed that either tube may be connected and the other disconnected atthe volition of the 10 person operating the a paratus.

In testimony whereo I have hereunto set my hand this 6th day of January,1920. 1

, HARRY F. WAITE.

